#!/usr/bin/env python3

import os
import sys
import getopt
import logging
import slixmpp

USAGE = """\
Usage:
  xmpp [-d] [-F FROM_JID] -m MESSAGE TO_JID...
  xmpp -h"""

HELP = """

Options:
  -d            run in DEBUG mode
  -m MESSAGE    the text of the message to be sent
  -h, --help    show this message

  FROM_JID      the address used to send the message from
  TO_JID        the addresses where to send the message to


Send a one-off XMPP message.


Examples:

  Send a message to eu@euandre.org:

    $ xmpp -m 'Hello, XMPP!' eu@euandre.org"""

class SendMsgBot(slixmpp.ClientXMPP):
    def __init__(self, jid, password, on_start):
        slixmpp.ClientXMPP.__init__(self, jid, password)

        self.on_start = on_start
        self.add_event_handler("session_start", self.start)

    def start(self, event):
        self.on_start(self)
        self.disconnect(wait=True)

def main():
    logging.basicConfig(level=logging.INFO)
    from_ = "bot@euandre.org"
    message = ""

    for s in sys.argv:
        if s == "--":
            break
        elif s == "--help":
            print(USAGE)
            print(HELP)
            sys.exit()

    try:
        opts, args = getopt.getopt(sys.argv[1:], 'm:F:dh')
    except getopt.GetoptError as err:
        print(err, file=sys.stderr)
        print(USAGE, file=sys.stderr)
        sys.exit(2)
    for o, a in opts:
        if o == "-m":
            message = a
        elif o == "-F":
            from_ = a
        elif o == "-d":
            logging.basicConfig(level=logging.DEBUG)
        elif o == "-h":
            print(USAGE)
            print(HELP)
            sys.exit()
        else:
            assert False, "unhandled option"

    if message == "":
        print("Missing -m MESSAGE", file=sys.stderr)
        print(USAGE, file=sys.stderr)
        sys.exit(2)

    if args == []:
        print("Missing TO_JID", file=sys.stderr)
        print(USAGE, file=sys.stderr)
        sys.exit(2)

    passcmd = "pass show from_ | head -n1  | tr -d '\\n'"
    password = os.popen(passcmd).read()

    def on_start(self):
        for to in args:
            self.send_message(mto=to, mbody=message, mtype='chat')

    xmpp = SendMsgBot(from_, password, on_start)
    xmpp.connect()
    xmpp.process(forever=False)

if __name__ == "__main__":
    main()